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KThread based debug

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This commit starts a big refactor to the original debugger PR by merryhime. The debugger now interfaces with KThreads instead of the ExecutionContext.

The corresponding KThread debug functions properly suspend/resume the thread and call the underlying debug related function in the ExecutionContext.

I also added debugging support to the AppleHV ExecutionContext.
This commit is contained in:
svc64 2023-09-25 11:00:07 +03:00
parent 841aa89581
commit ac438d6572
17 changed files with 157 additions and 144 deletions
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5
src/ARMeilleure/Instructions/NativeInterface.cs
View file

@ -175,6 +175,11 @@ namespace ARMeilleure.Instructions
ExecutionContext context = GetContext();
if (context.DebugStopped == 1)
{
return false;
}
context.CheckInterrupt();
Statistics.ResumeTimer();

28
src/ARMeilleure/State/ExecutionContext.cs
View file

@ -101,10 +101,8 @@ namespace ARMeilleure.State
private readonly ExceptionCallback _supervisorCallback;
private readonly ExceptionCallback _undefinedCallback;
internal int _debugState = (int)DebugState.Running;
internal int _shouldStep = 0;
internal ManualResetEvent _debugHalt = new ManualResetEvent(true);
internal Barrier _stepBarrier = new Barrier(2);
internal int ShouldStep;
internal int DebugStopped;
// This is only valid while debugging is enabled.
public ulong DebugPc;
@ -160,34 +158,26 @@ namespace ARMeilleure.State
public void DebugStop()
{
_debugHalt.Reset();
Interlocked.CompareExchange(ref _debugState, (int)DebugState.Stopping, (int)DebugState.Running);
if (Interlocked.CompareExchange(ref DebugStopped, 1, 0) == 0)
{
RequestInterrupt();
}
}
public bool DebugStep()
{
if (_debugState != (int)DebugState.Stopped)
if (DebugStopped != 1)
{
return false;
}
_shouldStep = 1;
_debugHalt.Set();
_stepBarrier.SignalAndWait();
_debugHalt.Reset();
_stepBarrier.SignalAndWait();
ShouldStep = 1;
return true;
}
public void DebugContinue()
{
_debugHalt.Set();
}
public DebugState GetDebugState()
{
return (DebugState)_debugState;
Interlocked.CompareExchange(ref DebugStopped, 0, 1);
}
internal void OnBreak(ulong address, int imm)

17
src/ARMeilleure/Translation/Translator.cs
View file

@ -147,21 +147,14 @@ namespace ARMeilleure.Translation
{
context.DebugPc = ExecuteSingle(context, context.DebugPc);
while (context._debugState != (int)DebugState.Running)
while (context.DebugStopped == 1)
{
Interlocked.CompareExchange(ref context._debugState, (int)DebugState.Stopped, (int)DebugState.Stopping);
context._debugHalt.WaitOne();
if (Interlocked.CompareExchange(ref context._shouldStep, 0, 1) == 1)
if (Interlocked.CompareExchange(ref context.ShouldStep, 0, 1) == 1)
{
context.DebugPc = Step(context, context.DebugPc);
context._stepBarrier.SignalAndWait();
context._stepBarrier.SignalAndWait();
}
else
{
Interlocked.CompareExchange(ref context._debugState, (int)DebugState.Running, (int)DebugState.Stopped);
context.RequestInterrupt();
}
context.CheckInterrupt();
}
}
while (context.Running && context.DebugPc != 0);
@ -222,7 +215,7 @@ namespace ARMeilleure.Translation
return nextAddr;
}
public ulong Step(State.ExecutionContext context, ulong address)
private ulong Step(State.ExecutionContext context, ulong address)
{
TranslatedFunction func = Translate(address, context.ExecutionMode, highCq: false, singleStep: true);

63
src/Ryujinx.Cpu/AppleHv/HvExecutionContext.cs
View file

@ -70,6 +70,8 @@ namespace Ryujinx.Cpu.AppleHv
private readonly ICounter _counter;
private readonly IHvExecutionContext _shadowContext;
private IHvExecutionContext _impl;
private int _shouldStep;
private int _debugStopped;
private readonly ExceptionCallbacks _exceptionCallbacks;
@ -131,22 +133,37 @@ namespace Ryujinx.Cpu.AppleHv
}
/// <inheritdoc/>
public void DebugStop() => _impl.DebugStop();
public void DebugStop()
{
if (Interlocked.CompareExchange(ref _debugStopped, 1, 0) == 0)
{
RequestInterrupt();
}
}
/// <inheritdoc/>
public bool DebugStep() => _impl.DebugStep();
public bool DebugStep()
{
if (_debugStopped != 1)
{
return false;
}
_shouldStep = 1;
return true;
}
/// <inheritdoc/>
public void DebugContinue() => _impl.DebugContinue();
/// <inheritdoc/>
public DebugState GetDebugState() => _impl.GetDebugState();
public void DebugContinue()
{
Interlocked.CompareExchange(ref _debugStopped, 0, 1);
}
/// <inheritdoc/>
public ulong DebugPc
{
get => _impl.DebugPc;
set => _impl.DebugPc = value;
get => Pc;
set => Pc = value;
}
/// <inheritdoc/>
@ -164,6 +181,18 @@ namespace Ryujinx.Cpu.AppleHv
while (Running)
{
if (Interlocked.CompareExchange(ref _shouldStep, 0, 1) == 1)
{
uint currentEl = Pstate & ~(0xfffffff0);
if (currentEl == 0b0101)
{
HvApi.hv_vcpu_get_sys_reg(vcpu.Handle, HvSysReg.SPSR_EL1, out ulong spsr).ThrowOnError();
spsr |= (1 << 21);
HvApi.hv_vcpu_set_sys_reg(vcpu.Handle, HvSysReg.SPSR_EL1, spsr);
}
HvApi.hv_vcpu_set_sys_reg(vcpu.Handle, HvSysReg.MDSCR_EL1, 1);
}
HvApi.hv_vcpu_run(vcpu.Handle).ThrowOnError();
HvExitReason reason = vcpu.ExitInfo->Reason;
@ -231,6 +260,21 @@ namespace Ryujinx.Cpu.AppleHv
SupervisorCallHandler(elr - 4UL, id);
vcpu = RentFromPool(memoryManager.AddressSpace, vcpu);
break;
case ExceptionClass.SoftwareStepLowerEl:
HvApi.hv_vcpu_get_sys_reg(vcpuHandle, HvSysReg.SPSR_EL1, out ulong spsr).ThrowOnError();
spsr &= ~((ulong)(1 << 21));
HvApi.hv_vcpu_set_sys_reg(vcpuHandle, HvSysReg.SPSR_EL1, spsr).ThrowOnError();
HvApi.hv_vcpu_set_sys_reg(vcpuHandle, HvSysReg.MDSCR_EL1, 0);
ReturnToPool(vcpu);
InterruptHandler();
vcpu = RentFromPool(memoryManager.AddressSpace, vcpu);
break;
case ExceptionClass.BrkAarch64:
ReturnToPool(vcpu);
BreakHandler(elr, (ushort)esr);
InterruptHandler();
vcpu = RentFromPool(memoryManager.AddressSpace, vcpu);
break;
default:
throw new Exception($"Unhandled guest exception {ec}.");
}
@ -241,11 +285,8 @@ namespace Ryujinx.Cpu.AppleHv
// TODO: Invalidate only the range that was modified?
return HvAddressSpace.KernelRegionTlbiEretAddress;
}
else
{
return HvAddressSpace.KernelRegionEretAddress;
}
}
private static void DataAbort(MemoryTracking tracking, ulong vcpu, uint esr)
{

20
src/Ryujinx.Cpu/AppleHv/HvExecutionContextShadow.cs
View file

@ -23,8 +23,6 @@ namespace Ryujinx.Cpu.AppleHv
private readonly ulong[] _x;
private readonly V128[] _v;
public ulong DebugPc { get; set; }
public HvExecutionContextShadow()
{
_x = new ulong[32];
@ -55,24 +53,6 @@ namespace Ryujinx.Cpu.AppleHv
{
}
public void DebugStop()
{
}
public bool DebugStep()
{
return false;
}
public void DebugContinue()
{
}
public DebugState GetDebugState()
{
return DebugState.Stopped;
}
public bool GetAndClearInterruptRequested()
{
return false;

43
src/Ryujinx.Cpu/AppleHv/HvExecutionContextVcpu.cs
View file

@ -13,14 +13,6 @@ namespace Ryujinx.Cpu.AppleHv
private static readonly SetSimdFpReg _setSimdFpReg;
private static readonly IntPtr _setSimdFpRegNativePtr;
internal int _debugState = (int)DebugState.Running;
internal int _shouldStep = 0;
internal ManualResetEvent _debugHalt = new ManualResetEvent(true);
internal Barrier _stepBarrier = new Barrier(2);
// This is only valid while debugging is enabled.
public ulong DebugPc { get; set; }
public ulong ThreadUid { get; set; }
static HvExecutionContextVcpu()
@ -198,41 +190,6 @@ namespace Ryujinx.Cpu.AppleHv
}
}
public void DebugStop()
{
_debugHalt.Reset();
Interlocked.CompareExchange(ref _debugState, (int)DebugState.Stopping, (int)DebugState.Running);
ulong vcpu = _vcpu;
HvApi.hv_vcpus_exit(ref vcpu, 1);
}
public bool DebugStep()
{
if (_debugState != (int)DebugState.Stopped)
{
return false;
}
_shouldStep = 1;
_debugHalt.Set();
_stepBarrier.SignalAndWait();
_debugHalt.Reset();
_stepBarrier.SignalAndWait();
return true;
}
public void DebugContinue()
{
_debugHalt.Set();
HvApi.hv_vcpu_run(_vcpu);
}
public DebugState GetDebugState()
{
return (DebugState)_debugState;
}
public bool GetAndClearInterruptRequested()
{
return Interlocked.Exchange(ref _interruptRequested, 0) != 0;

8
src/Ryujinx.Cpu/AppleHv/IHvExecutionContext.cs
View file

@ -42,13 +42,5 @@ namespace Ryujinx.Cpu.AppleHv
void RequestInterrupt();
bool GetAndClearInterruptRequested();
// TODO: comments
void DebugStop();
bool DebugStep();
void DebugContinue();
DebugState GetDebugState();
ulong DebugPc { get; set; }
}
}

1
src/Ryujinx.Cpu/IExecutionContext.cs
View file

@ -118,7 +118,6 @@ namespace Ryujinx.Cpu
void DebugStop();
bool DebugStep();
void DebugContinue();
DebugState GetDebugState();
ulong DebugPc { get; set; }
}

3
src/Ryujinx.Cpu/Jit/JitExecutionContext.cs
View file

@ -125,9 +125,6 @@ namespace Ryujinx.Cpu.Jit
/// <inheritdoc/>
public void DebugContinue() => _impl.DebugContinue();
/// <inheritdoc/>
public DebugState GetDebugState() => _impl.GetDebugState();
/// <inheritdoc/>
public ulong DebugPc
{

2
src/ARMeilleure/State/DebugState.cs → src/Ryujinx.HLE/Debugger/DebugState.cs
View file

@ -1,4 +1,4 @@
namespace ARMeilleure.State
namespace Ryujinx.HLE.Debugger
{
public enum DebugState
{

33
src/Ryujinx.HLE/Debugger/Debugger.cs
View file

@ -2,6 +2,8 @@ using ARMeilleure.State;
using Ryujinx.Common;
using Ryujinx.Common.Logging;
using Ryujinx.Memory;
using Ryujinx.HLE.HOS.Kernel;
using Ryujinx.HLE.HOS.Kernel.Threading;
using System;
using System.Collections.Concurrent;
using System.Linq;
@ -46,8 +48,8 @@ namespace Ryujinx.HLE.Debugger
private void HaltApplication() => Device.System.DebugGetApplicationProcess().DebugStopAllThreads();
private ulong[] GetThreadIds() => Device.System.DebugGetApplicationProcess().DebugGetThreadUids();
private Ryujinx.Cpu.IExecutionContext GetThread(ulong threadUid) => Device.System.DebugGetApplicationProcess().DebugGetThreadContext(threadUid);
private Ryujinx.Cpu.IExecutionContext[] GetThreads() => GetThreadIds().Select(x => GetThread(x)).ToArray();
private KThread GetThread(ulong threadUid) => Device.System.DebugGetApplicationProcess().DebugGetThread(threadUid);
private KThread[] GetThreads() => GetThreadIds().Select(x => GetThread(x)).ToArray();
private IVirtualMemoryManager GetMemory() => Device.System.DebugGetApplicationProcess().CpuMemory;
private void InvalidateCacheRegion(ulong address, ulong size) =>
Device.System.DebugGetApplicationProcess().InvalidateCacheRegion(address, size);
@ -304,8 +306,8 @@ namespace Ryujinx.HLE.Debugger
break;
}
IExecutionContext ctx = GetThread(threadId.Value);
if (ctx.GetDebugState() == DebugState.Stopped)
KThread thread = GetThread(threadId.Value);
if (thread.GetDebugState() == DebugState.Stopped)
{
Reply(ToHex("Stopped"));
}
@ -387,7 +389,7 @@ namespace Ryujinx.HLE.Debugger
return;
}
GetThread(cThread.Value).DebugPc = newPc.Value;
GetThread(cThread.Value).Context.DebugPc = newPc.Value;
}
foreach (var thread in GetThreads())
@ -410,7 +412,7 @@ namespace Ryujinx.HLE.Debugger
return;
}
var ctx = GetThread(gThread.Value);
var ctx = GetThread(gThread.Value).Context;
string registers = "";
for (int i = 0; i < GdbRegisterCount; i++)
{
@ -428,7 +430,7 @@ namespace Ryujinx.HLE.Debugger
return;
}
var ctx = GetThread(gThread.Value);
var ctx = GetThread(gThread.Value).Context;
for (int i = 0; i < GdbRegisterCount; i++)
{
if (!GdbWriteRegister(ctx, i, ss))
@ -513,7 +515,7 @@ namespace Ryujinx.HLE.Debugger
return;
}
var ctx = GetThread(gThread.Value);
var ctx = GetThread(gThread.Value).Context;
string result = GdbReadRegister(ctx, gdbRegId);
if (result != null)
{
@ -533,7 +535,7 @@ namespace Ryujinx.HLE.Debugger
return;
}
var ctx = GetThread(gThread.Value);
var ctx = GetThread(gThread.Value).Context;
if (GdbWriteRegister(ctx, gdbRegId, ss) && ss.IsEmpty())
{
ReplyOK();
@ -552,15 +554,16 @@ namespace Ryujinx.HLE.Debugger
return;
}
var ctx = GetThread(cThread.Value);
var thread = GetThread(cThread.Value);
if (newPc.HasValue)
{
ctx.DebugPc = newPc.Value;
thread.Context.DebugPc = newPc.Value;
}
ctx.DebugStep();
Reply($"T05thread:{ctx.ThreadUid:x};");
thread.DebugStep();
Reply($"T05thread:{thread.ThreadUid:x};");
}
private void CommandIsAlive(ulong? threadId)
@ -721,7 +724,9 @@ namespace Ryujinx.HLE.Debugger
public void ThreadBreak(IExecutionContext ctx, ulong address, int imm)
{
ctx.DebugStop();
KThread thread = GetThread(ctx.ThreadUid);
thread.DebugStop();
Logger.Notice.Print(LogClass.GdbStub, $"Break hit on thread {ctx.ThreadUid} at pc {address:x016}");

5
src/Ryujinx.HLE/Debugger/IDebuggableProcess.cs
View file

@ -1,12 +1,13 @@
using Ryujinx.Memory;
using Ryujinx.HLE.HOS.Kernel.Threading;
namespace Ryujinx.HLE.Debugger
{
public interface IDebuggableProcess
internal interface IDebuggableProcess
{
void DebugStopAllThreads();
ulong[] DebugGetThreadUids();
Ryujinx.Cpu.IExecutionContext DebugGetThreadContext(ulong threadUid);
public KThread DebugGetThread(ulong threadUid);
IVirtualMemoryManager CpuMemory { get; }
void InvalidateCacheRegion(ulong address, ulong size);
}

2
src/Ryujinx.HLE/HOS/Horizon.cs
View file

@ -475,7 +475,7 @@ namespace Ryujinx.HLE.HOS
IsPaused = pause;
}
public IDebuggableProcess DebugGetApplicationProcess()
internal IDebuggableProcess DebugGetApplicationProcess()
{
lock (KernelContext.Processes)
{

15
src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
View file

@ -12,6 +12,7 @@ using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using ExceptionCallback = Ryujinx.Cpu.ExceptionCallback;
namespace Ryujinx.HLE.HOS.Kernel.Process
{
@ -748,6 +749,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
{
KThread currentThread = KernelStatic.GetCurrentThread();
if (currentThread.GetDebugState() != DebugState.Running)
{
KernelContext.CriticalSection.Enter();
currentThread.Suspend(ThreadSchedState.ThreadPauseFlag);
currentThread.DebugHalt.Set();
KernelContext.CriticalSection.Leave();
}
if (currentThread.Context.Running &&
currentThread.Owner != null &&
currentThread.GetUserDisableCount() != 0 &&
@ -1200,7 +1209,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
{
foreach (KThread thread in _parent._threads)
{
thread.Context.DebugStop();
thread.DebugStop();
}
}
}
@ -1213,11 +1222,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
}
}
public Ryujinx.Cpu.IExecutionContext DebugGetThreadContext(ulong threadUid)
public KThread DebugGetThread(ulong threadUid)
{
lock (_parent._threadingLock)
{
return _parent._threads.FirstOrDefault(x => x.ThreadUid == threadUid)?.Context;
return _parent._threads.FirstOrDefault(x => x.ThreadUid == threadUid);
}
}

5
src/Ryujinx.HLE/HOS/Kernel/Process/ProcessExecutionContext.cs
View file

@ -48,11 +48,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
{
}
public DebugState GetDebugState()
{
return DebugState.Stopped;
}
public void StopRunning()
{
Running = false;

1
src/Ryujinx.HLE/HOS/Kernel/Threading/KScheduler.cs
View file

@ -296,6 +296,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
currentThread.SchedulerWaitEvent.Reset();
currentThread.ThreadContext.Unlock();
currentThread.DebugHalt.Set();
// Wake all the threads that might be waiting until this thread context is unlocked.
for (int core = 0; core < CpuCoresCount; core++)

48
src/Ryujinx.HLE/HOS/Kernel/Threading/KThread.cs
View file

@ -1,5 +1,6 @@
using Ryujinx.Common.Logging;
using Ryujinx.Cpu;
using Ryujinx.HLE.Debugger;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Process;
using Ryujinx.HLE.HOS.Kernel.SupervisorCall;
@ -114,6 +115,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
private readonly object _activityOperationLock = new();
private int _debugState = (int)DebugState.Running;
internal readonly ManualResetEvent DebugHalt = new(false);
public KThread(KernelContext context) : base(context)
{
WaitSyncObjects = new KSynchronizationObject[MaxWaitSyncObjects];
@ -1432,5 +1436,49 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
Owner.CpuMemory.Write<ushort>(_tlsAddress + TlsUserInterruptFlagOffset, 0);
}
public bool DebugStep()
{
if (_debugState != (int)DebugState.Stopped || !Context.DebugStep())
{
return false;
}
DebugHalt.Reset();
SetActivity(false);
DebugHalt.WaitOne();
return true;
}
public void DebugStop()
{
if (Interlocked.CompareExchange(ref _debugState, (int)DebugState.Stopping,
(int)DebugState.Running) != (int)DebugState.Running)
{
return;
}
Context.DebugStop();
DebugHalt.WaitOne();
DebugHalt.Reset();
_debugState = (int)DebugState.Stopped;
}
public void DebugContinue()
{
if (Interlocked.CompareExchange(ref _debugState, (int)DebugState.Running,
(int)DebugState.Stopped) != (int)DebugState.Stopped)
{
return;
}
Context.DebugContinue();
SetActivity(false);
}
public DebugState GetDebugState()
{
return (DebugState)_debugState;
}
}
}